CVE-2021-3737CWE-400CWE-835denial-of-service

CVE-2021-3737

High · published March 5, 2022

CVSS v3.1
7.5
EPSS
13%
Percentile
96.4
In the wild
Unconfirmed
What it is

A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.13166 · 96.4th percentile
Weaknesses
CWE-400 · Uncontrolled Resource Consumption; CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
Published
2022-03-05T00:15Z
Affected products (27)
ProductVersionsFixed in
python/python≥ 3.6.0, < 3.6.143.6.14
python/python≥ 3.7.0, < 3.7.113.7.11
python/python≥ 3.8.0, < 3.8.113.8.11
python/python≥ 3.9.0, < 3.9.63.9.6
redhat/codeready_linux_builderall versions—
redhat/codeready_linux_builder_for_ibm_z_systemsall versions—
redhat/codeready_linux_builder_for_power_little_endianall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linux_for_ibm_z_systemsall versions—
redhat/enterprise_linux_for_power_little_endianall versions—
fedoraproject/fedoraall versions—
fedoraproject/fedoraall versions—
canonical/ubuntu_linuxall versions—
canonical/ubuntu_linuxall versions—
canonical/ubuntu_linuxall versions—
canonical/ubuntu_linuxall versions—
canonical/ubuntu_linuxall versions—
netapp/netapp_xcp_smball versions—
netapp/ontap_select_deploy_administration_utilityall versions—
netapp/xcp_nfsall versions—
netapp/hciall versions—
netapp/management_services_for_element_softwareall versions—
oracle/communications_cloud_native_core_binding_support_functionall versions—
oracle/communications_cloud_native_core_network_exposure_functionall versions—
oracle/communications_cloud_native_core_policyall versions—
References (23)
https://bugs.python.org/issue44022 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=1995162 · [email protected]https://github.com/python/cpython/pull/25916 · [email protected]https://bugs.python.org/issue44022 · af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1995162 · af854a3a-2127-422b-91ae-364da2661108https://github.com/python/cpython/pull/25916 · af854a3a-2127-422b-91ae-364da2661108https://github.com/python/cpython/pull/26503 · af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html · af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html · af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/11/msg00024.html · af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html · af854a3a-2127-422b-91ae-364da2661108https://python-security.readthedocs.io/vuln/urllib-100-continue-loop.html · af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20220407-0009/ · af854a3a-2127-422b-91ae-364da2661108https://ubuntu.com/security/CVE-2021-3737 · af854a3a-2127-422b-91ae-364da2661108https://github.com/python/cpython/pull/26503 · [email protected]https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html · [email protected]https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html · [email protected]https://python-security.readthedocs.io/vuln/urllib-100-continue-loop.html · [email protected]https://security.netapp.com/advisory/ntap-20220407-0009/ · [email protected]https://ubuntu.com/security/CVE-2021-3737 · [email protected]https://www.oracle.com/security-alerts/cpujul2022.html · [email protected]https://www.oracle.com/security-alerts/cpujul2022.html · af854a3a-2127-422b-91ae-364da2661108https://cert-portal.siemens.com/productcert/html/ssa-398330.html · 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
EPSS history
Timeline
  • 04 MAR 00:00Z
    A flaw was found in python
    cvelistv5